Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model DDX
Single Interlock Preaction Systems
2” (50 mm), 2½” (65 mm), 3” (80 mm),
76 mm, 4” (100 mm), 6” (150 mm),
165 mm & 8” (200 mm)
Bulletin 749 January 2021
Bulletin 749 January 2021
Instructions for Installation,
Operation, Care, and
Maintenance
Wet Pilot Line,
Dry Pilot Line, and
Electric Actuation Trims
• Electric Release Trim Available with 175 psi (12.1
bar) or 300 psi (20.7 bar) Rated Solenoid Valve
• Electric Release Trim and Wet Pilot Trim Utilizing 7
to 10 psi (0.5 to 0.7 bar) Pneumatic Supervising
Pressure
• Dry Pilot Trim Utilizing 8 psi to 28 psi (0.6 to 1.9
bar) Pneumatic Supervising Pressure
• Externally Resettable Clapper
• One Main Drain
Model DDX Single Interlock Preaction
(Shown with Electric Actuation Trim)
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